diff options
Diffstat (limited to 'test/unit/test_dwarf.py')
| -rw-r--r-- | test/unit/test_dwarf.py | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/unit/test_dwarf.py b/test/unit/test_dwarf.py index 37abf6b18..809c4af05 100644 --- a/test/unit/test_dwarf.py +++ b/test/unit/test_dwarf.py @@ -26,3 +26,26 @@ class DWARFTest(utils.BinaryenTestCase): # safe passes do not err = shared.run_process(shared.WASM_OPT + args + ['--metrics'], stderr=subprocess.PIPE).stderr self.assertNotIn(warning, err) + + def test_strip_dwarf_and_opts(self): + # some optimizations are disabled when DWARF is present (as they would + # destroy it). we scan the wasm to see if there is any DWARF when + # making the decision whether to run them. this test checks that we also + # check if --strip* is being run, which would remove the DWARF anyhow + path = self.input_path(os.path.join('dwarf', 'cubescript.wasm')) + # strip the DWARF, then run all the opts to check as much as possible + args = [path, '--strip-dwarf', '-Oz'] + # run it normally, without -g. in this case no DWARF will be preserved + # in a trivial way + shared.run_process(shared.WASM_OPT + args + ['-o', 'a.wasm']) + # run it with -g. in this case we need to be clever as described above, + # and see --strip-dwarf removes the need for DWARF + shared.run_process(shared.WASM_OPT + args + ['-o', 'b.wasm', '-g']) + # run again on the last output without -g, as we don't want the names + # section to skew the results + shared.run_process(shared.WASM_OPT + ['b.wasm', '-o', 'c.wasm']) + # compare the sizes. there might be a tiny difference in size to to + # minor roundtrip changes, so ignore up to a tiny % + a_size = os.path.getsize('a.wasm') + c_size = os.path.getsize('c.wasm') + self.assertLess((100 * abs(a_size - c_size)) / c_size, 1) |